222816285 has 16 divisors (see below), whose sum is σ = 396118080. Its totient is φ = 118835280.

The previous prime is 222816283. The next prime is 222816289. The reversal of 222816285 is 582618222.

222816285 is a `hidden beast` number, since 2 + 2 + 28 + 1 + 628 + 5 = 666.

It is not a de Polignac number, because 222816285 - 2¹ = 222816283 is a prime.

It is a super-2 number, since 2×222816285² = 99294193722402450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222816281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 825111 + ... + 825380.

It is an arithmetic number, because the mean of its divisors is an integer number (24757380).

Almost surely, 2^222816285 is an apocalyptic number.

It is an amenable number.

222816285 is a deficient number, since it is larger than the sum of its proper divisors (173301795).

222816285 is a wasteful number, since it uses less digits than its factorization.

222816285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650505 (or 1650499 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 222816285 is about 14927.0320224752. The cubic root of 222816285 is about 606.2461258831.

The spelling of 222816285 in words is "two hundred twenty-two million, eight hundred sixteen thousand, two hundred eighty-five".